Tire-making machine



Feb. 25, 1930. sc o 1 1,748,622

TIRE MAKING MACHINE Filed Oct. 25. 1927 52; J3 v 3.7 HII 56 1 HM )iZMZea 50m 4} M,%# *7 i 1 Patents-ant. 25, 1930 UNITED STATES PATENT oFFICE VMERLE C. SCBOTE OI KENMORE, OHIO, ASSIGNOB TO THE B. F. GOODBIOHCOMPANY,

I 01' NEW YORK, N. Y., A CORPORATION OF NEW YORK TIRE-MAKING MACHINEApplication filed October 25, 1927. Serial No. 228,607.

This invention relates to tire-making machines and especially to toolmountings pivotally mounted and adapted to be turned about their pivotsto bring the tools carried thereby into operative position with relationto a rotatably mounted tire-building core.

My chief objects are to provide a machine in which the pivotedtool-mounting will be so constructed and arranged as to be easily 1oturned upon its pivot toand from operative position without suchviolence ofmovement (into its operative or into its inoperativeposition) as occurred with mountings heretofore employed; to provide apivoted tool- 16 mounting adapted to remain in whatever position it isreleased in by the operator;.to rovide a pivoted tool-mounting stronglyeld by gravity in its operative position and also in its inoperativeposition without being subject to violent movement by gravity intoeither of those positions; and to provide a tool-mounting adapted forready adjustment to operate in conjunction with tire .cores of differentdiameters mounted on the tiremaking machine. Of the accompanyingdrawings,

Fig. 1 is an elevation of parts of a tiremaking machine embodying myinvention in its preferred form, the tire core and the work thereonbeing sectioned and broken away.

Fig. 2 is a section on a line 2-2 of Fig.- 1.

Fig. 3 is a section on line 3-3 of Fig. 2.

Referring to the drawings, the machine 5 comprises a device 10 of knowntype for supporting and rotating a tireuilding core 11 mounted thereon.

Secured upon and rising from the frame of the core rotating device is avertical post 12" formed with a vertical spline 13 on one side thereof.A bracket 14 formed with a sleeve having an internal groove fitting thespline 13 is slidably mounted upon the post 12'and is adapted to beraised and lowered thereon by means of a hand screw 15 threaded througha cap 16 mounted upon the upper end of the brackets sleeve, the screw 15being v adapted to bear against the upper end face 50 of the post 12 andhaving a lock nut 17 ooopposite sides of the tire core 11.

acting with the cap 16 to secure the screw in posltions of adjustment.

At each side the bracket 14 is formed with I a stub shaft 18 upon whichis journaled a hub-member 19 formed'with sockets 20, 21 for atool-mounting bar 22 and a-counterweight bar 23, the socket 20 beingformed with a stop lug 20 adapted to abut a projection 14 formed on thebracket 14 to stop the tool-mounting bar 22in position for the toolsmounted thereon to operate upon a partly built tire 24 mounted upon thecore 11, and to abut a projection 14 alsoformed on said bracket forstopping the bar in its moperative position of rest. Tire tools such asthe finishing strip guides 25, 25 or the bead guiding tools 26, 26 aremounted upon respective threaded arms 27, 27 which are screwed into, andadapted to be clamped against rotatlon by, respective split clampingmembers 28, 28, each clamping member being pivoted upon a bracket '29adjustably clamped upon the tool-mounting bar 22, a pair of such toolassemblies being mounted upon each of the bars 22 for concurrent actionof the tools at Each clamping member 28 is connected with the bracket 29by an over-center pull' spring 30 adapted to hold the tool alternatelyin operative relation to the core, as shown in Fig. 1 with respect toone of the bead guidlng tools 26, or in inoperative position, away fromthe core, as shown with respect to the other bead guiding tool 26 inFig. 1.

Secured upon each of the counter-weight bars 23 1s a counter-weight 31,and the sockets 20 and 21 for the tool-mounting bar 22 and thecounter-weight bar 23 respectively of each of the hub-members 19 arepositioned at such an angle to each other about the shaft 18 of thehub-member that when the toolmounting bar 22 is in its elevated,inoperative position, as shown with respect to the farther tool arm inFig. 1, its counter-weight bar 23 will be horizontally disposed andconsequently acting with approximately its maximum leverage, while thetool-mounting bar 22 acts with less leverage than it does when inhorizontal position. The construction thus is such that gravity will actwith a mounting bar 22 and the counter-weight arm- 23 also is such thatwhen the tool-mounting bar 22 is in its horizontal, operative position,as shown with respect to the nearer bar "22 in Fig. 1, the bar will beurged downward by gravity with approm'mately its maximum leverage,whereas the counter-weight arm 23, being in an inclined position, willhave a comparatively small leverage against the: downward force of thetool-mounting bar 22 and consequently the tool-mounting bar will bestrongly held by gravity in its lowermost, operative position.

The structure may be defined in difierent language by saying that theangular relation of the bars 22 and 23 is such that the center ofgravity of the pivoted structure as a whole is higherthan the shaft 18and is in such position that it passes over-center with'relation to theshaft 18 when the toolmounting bar 22 is moved between its operative andinoperative positions, so that the force of gravity upon the pivotedstructure as a whole acts through the center of gravity at the left sideof the shaft 18 in Fig. 1 when the tool-mounting bar 22 is inhorizontal, operative position, and lifting of the tool bar to theinoperative position carries the center of gravity over the shaft 18 tothe right-hand side thereof, so that gravity then acts to holdthetool-mounting bar elevated.

To prevent violent movement of the pivoted structure into either ofthese positions,

each hub-member 19 has mounted'on each of the stub shaftl To preventrotation of.

face thereof a friction washer 32 or 33, preferably formed of fibrousmaterial, and the friction washers and hub-member are held in frictionalengagement with each other by a metallic washer 34 mounted upon areduced end portion of the stub shaft 18 and yieldingly urged inwardthereon by a spring clip 35 backed by a nut 36 screwed upon the end thefriction washers 33, each has its inner j periphery formed with a notchand these notches engagerespective studs or pins 37, 37 projecting fromthe reduced portions of the stub shafts 18, as shown in Figs. 2' and 3.

lhe operation of the device with regard.

meaeaa struction, the advantagesset out in the above.

statement of objects.

Variousmodifications are possible within the scope ofmy; invention asdefined in the appended claims. a

, I'claim:

1. In a tire-making machine the combina tion of a rotatably supportedtire-building core and a pivoted tool-mounting structure adapted to beswung into and out of operative relation to the core and having itscenter of gravlty so positioned as to passover center with relation toits pivot as it is so to be swung to a substantially horizontal 1operative position with relation to the core and the counter-weight armbeing so angularly disposed with relation to the tool arm as to stand inan approximately vertical position when the tool arm is horizontal.

3. A combination as defined in claim 2 ineluding frictional means forbraking the angular movement of the hub-member.

In witness whereof I have hereunto set my hand this 20th day of October,1927. l

w MERLE C. SGROTE.

